Portion of a shoe



FIG. 1 is a first perspective view of a portion of a shoe showing my new design;

FIG. 2 is a second perspective view thereof; and,

FIG. 3 is a side view thereof.

The broken line showing of the horizontal section of the rear element is for illustrative purposes only and forms no part of the claimed design. The broken line showing immediately adjacent the shaded regions represants an unclaimed boundary of the claimed design. The broken line showing of the remainder of the shoe is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a portion of a shoe, as shown and described. 